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In the addition table above, each number in the table is the sum of th

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In the addition table above, each number in the table is the sum of th  [#permalink]

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New post 16 Aug 2018, 06:36
1
7
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A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

58% (02:59) correct 42% (02:19) wrong based on 65 sessions

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In the addition table above, each number in the table is the sum of the terms at the top of its column and the left of its row. If
x + c = 4,
v - b = 2,
a + z = 1,

knowing the value of which of the following variables would be sufficient find the value of x ?

A. n
B. q
C. s
D. v
E. w


Source: Jeff Sackman

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Re: In the addition table above, each number in the table is the sum of th  [#permalink]

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New post 16 Aug 2018, 07:08
1
From the matrix, we can write V=B+Z.
Given V-B =2. From this Z=2
Also W=C+Z and X+C=4
If we know the value of W, we can find the value of X.
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New post 16 Aug 2018, 12:06
longranger25 wrote:
In the addition table above, each number in the table is the sum of the terms at the top of its column and the left of its row. If
x + c = 4,
v - b = 2,
a + z = 1,

knowing the value of which of the following variables would be sufficient find the value of x ?

A. n
B. q
C. s
D. v
E. w


Source: Jeff Sackman


From the table,
x+a=m -----------(1)
x+c=p ------------(2)
z+b=v------------ (3)

Given, x+c=4---(4)
From (1) & (4), p=4.
Given, v-b=2
or, z+b-b=2 (from (3), v=z+b)
or, z=2
Given, a+z=1, so, a=1-2=-1
Now we know the value of a,z, and p.

From the table, we have z+c=w
or, 2+(4-x)=w (from (4), c=4-x)
or, x=6-w.

Therefore, the value of 'w' would be sufficient to find the value of 'x'.

Ans.(E)
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Re: In the addition table above, each number in the table is the sum of th  [#permalink]

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New post 20 Aug 2018, 20:54
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TIP:

These kind of questions fall into the category " BRAINERS" .
And it would be wise to say that if you see such problems in your exam it is better to drop it within 30seconds as these problems are easy but are especially asked to waste our time. So I would suggest drop such problem within 30sec in your GMAT exam.

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Re: In the addition table above, each number in the table is the sum of th   [#permalink] 20 Aug 2018, 20:54
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